DE2913731C2 - Catalytic exhaust gas cleaning device for the internal combustion engine of a motor vehicle - Google Patents

Catalytic exhaust gas cleaning device for the internal combustion engine of a motor vehicle

Info

Publication number
DE2913731C2
DE2913731C2 DE2913731A DE2913731A DE2913731C2 DE 2913731 C2 DE2913731 C2 DE 2913731C2 DE 2913731 A DE2913731 A DE 2913731A DE 2913731 A DE2913731 A DE 2913731A DE 2913731 C2 DE2913731 C2 DE 2913731C2
Authority
DE
Germany
Prior art keywords
inlet
exhaust gas
chamber
internal combustion
combustion engine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DE2913731A
Other languages
German (de)
Other versions
DE2913731A1 (en
Inventor
Akio Gunma Kakinuma
Hiroo Ohta Gunma Oya
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Subaru Corp
Original Assignee
Fuji Jukogyo KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fuji Jukogyo KK filed Critical Fuji Jukogyo KK
Publication of DE2913731A1 publication Critical patent/DE2913731A1/en
Application granted granted Critical
Publication of DE2913731C2 publication Critical patent/DE2913731C2/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
    • F01N3/2853—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1888—Construction facilitating manufacture, assembly, or disassembly the housing of the assembly consisting of two or more parts, e.g. two half-shells
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
    • F01N3/2853—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing
    • F01N3/2867—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing the mats or gaskets being placed at the front or end face of catalyst body
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2892—Exhaust flow directors or the like, e.g. upstream of catalytic device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/20—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a flow director or deflector
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/24—Methods or apparatus for fitting, inserting or repairing different elements by bolts, screws, rivets or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/16—Plurality of inlet tubes, e.g. discharging into different chambers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/18—Structure or shape of gas passages, pipes or tubes the axis of inlet or outlet tubes being other than the longitudinal axis of apparatus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Description

Die Erfindung betrifft eine katalytische Abgasreinigungsvorrichtung nach dem Oberbegriff des Patentan-Spruchs. The invention relates to a catalytic exhaust gas purification device according to the generic term of the patent claim.

Eine solche V.-richtung ist aus der DE-OS 23 05 818 bekannt.Such a V. direction is known from DE-OS 23 05 818.

Ferner ist es bekannt, in der Einlaßkammer einer Einrichtung zur katarytischen Abgasreinigung vor dem Katalysatorelement einen mit Lochern versehenen Verteiler mit V-förmigem Querschnitt anzuordnen (DE-OS 23 07 215). Dabei werden die Abgase in einer schmalen Umfangszone der Verteilerplatte zusammengedrängt, so daß die Verteilerwirkung gering ist und ein wesentlicher Abgasrückdruck vorhanden ist, wodurch die Schadstoff-Emission und die Motorleistung ungünstig beeinflußt werden.It is also known in the inlet chamber of a device for catarytic exhaust gas cleaning before Catalyst element to arrange a distributor provided with holes with a V-shaped cross-section (DE-OS 23 07 215). The exhaust gases are compressed in a narrow circumferential zone of the distributor plate, so that the distribution effect is low and there is a substantial exhaust gas back pressure, whereby pollutant emissions and engine performance are adversely affected.

Schließlich ist auch eine Vorrichtung zur katalytischen Reinigung der Auspuffgase von Brennkraftmaschinen bekannt, deren Gehäuse einen annähernd elliptischen Querschnitt hat (DE-OS 23 03 789).Finally, there is also a device for the catalytic cleaning of the exhaust gases from internal combustion engines known whose housing has an approximately elliptical cross section (DE-OS 23 03 789).

Der Erfindung liegt die Aufgabe zugrunde, eine katalytische Abgasreinigungsvorrichtung für den Verbrennungsmotor eines Kraftfahrzeugs zu schaffen, welche die einströmenden Abgase ohne Stau gleichmäßig auf das Katalysatorelement verteilt, einen günstigen Gehäusequerschnitt hat und trotzdem die nötige Festigkeit und Steifheit des Gehäuses aufweist.The invention is based on the object of a catalytic exhaust gas cleaning device for the internal combustion engine to create a motor vehicle, which the inflowing exhaust gases without congestion evenly Distributed on the catalytic converter element, has a favorable housing cross-section and still has the necessary Has strength and rigidity of the housing.

Gelöst wird diese Aufgabe durch die Merkmale des Anspruchs.This problem is solved by the features of the claim.

Die Verteilerplatte nimmt nicht den ganzen Querschnitt der Einlaßkammer ein, vielmehr bleibt um die Verteilerplatte ein freier Umfangsbereich der Einlaßkammer, wodurch die verteilten Abgase in das Katalysatorelement ohne Stau strömen.The distributor plate does not take up the entire cross-section the inlet chamber, rather a free peripheral area of the inlet chamber remains around the distributor plate, whereby the distributed exhaust gases flow into the catalyst element without congestion.

Die Erfindung wird beispielhaft anhand der Zeichnung beschrieben, in der istThe invention is illustrated by way of example with reference to the drawing described in which is

Fig. 1 ein Längsschnitt durch eine Vorrichtung der Erfindung,Fig. 1 is a longitudinal section through a device of Invention,

Fig.2 ein Querschnitt durch die Vorrichtung nach Fig. 1,2 shows a cross section through the device according to Fig. 1,

Fig.3 eine perspektivische Ansicht eines Verteilers3 is a perspective view of a distributor

Fig.4 eine Draufsicht auf einen Einlaßkammerbereich im Schnitt.Figure 4 is a plan view of an inlet chamber area on average.

Die katalytische Abgasreinigungsvorrichtung 5 weist ein monolithisches Katalysatorelement 6, welches in einem Gehäuse 7 mit elliptischem Querschnitt angeordnet ist, sowie einen Schutzmantel 8 auf. Das Katalysatorelement ist ein monolithischer Dreiweg-Katalysator; aber es können auch andere Arten von Katalysatoren verwendet werden. Das Gehäuse 7 weist zwei Halbschalen 11 und 10 auf, die jeweils als Preßteil aus rostfreiem Stahlblech hergestellt sind. Jede Halbschale 11 und 10 besteht aus einem mittleren Teil, einer verjüngten Einlaßschale 12 sowie einer verjüngten Auslaßschale. Die Einlaßschale 12 ist mit zwei halbkreisförmigen Einlaßöffnungen 14 und 15 ausgebildet, während die Auslaßschale einen halbkreisförmigen Auslaßbereich hat Durch Vereinigen der beiden Halbschalen 11 und 10 wird eine Katalysatorkammer gebildet, während die verjüngten Einlaßschalen 12 eine Einlaßkammer 17 und Einlaßöffnungen 14 und 15 bilden. Ferner wird von den verjüngten Auslaßschalcn cine Auslaßkammer 20 gebildet. Die Achsen der Einlaßöffnungen 14 und 15 bilden einen spitzen Winkel mit der Eintrittsstirnebene des Katalysatorelements, so daß der Querschnitt der Einlaßöffnung im wesentlichen der elliptischen Form der Eintrittsstirnebene des Katalysatorelements entspricht Das monolithische Katalysatorelement 6 steht mit einem ringförmigen Rand 22 im vorderen Endbereich in Eingriff, und ein Drahtsieb 23 sowie Stoßdämpffygeflechte 24 und 25 sind zwischen dem Gehäuse 7 und dem Umfang des Randes und dem Katalysatorelement vorgesehen. Das Dämpfergeflecht 24 ist zwischen einer Schulter des Gehäuses 7 und dem ringförmigen Rand 22 angeordnet, während das Stoßdämpfergeflecht 25 zwischen einer Schulter des Gehäuses und dem Ende des Katalysatorelements angeordnet ist. Auf diese Weise ist das monolithische Katalysatorelement 6 vom Drahtsieb 23 und den Stoßdämpfergeflechten 24 ur.d 25 federnd nachgiebig gehalten, so daß eine Bewegung des Katalysatorelements verhindert ist. Ferner wirkt das Stoßdämpfergeflecht 24 mit dem ringförmigen Rand 22 als Dichtungsvorrichtung, die verhindert, daß Abgase durch den Raum zwischen dem Katalysatorelement und der Innenwand des Gehäuses 7 hindurchgelangen.The catalytic exhaust gas purification device 5 has a monolithic catalyst element 6, which in FIG a housing 7 is arranged with an elliptical cross section, and a protective jacket 8. The catalyst element is a three-way monolithic catalyst; but other types of catalysts can also be used be used. The housing 7 has two half-shells 11 and 10, each of which is a pressed part stainless steel sheet are made. Each half-shell 11 and 10 consists of a central part, one tapered inlet shell 12 and a tapered outlet shell. The inlet cup 12 has two semicircular inlet openings 14 and 15 are formed, while the outlet cup is semicircular By combining the two half-shells 11 and 10, a catalyst chamber is created while the tapered inlet shells 12 form an inlet chamber 17 and inlet openings 14 and 15. Furthermore, the tapered outlet shells cine Outlet chamber 20 is formed. The axes of the inlet ports 14 and 15 form an acute angle with the Entrance end plane of the catalyst element, so that the cross section of the inlet opening is essentially the The monolithic catalyst element corresponds to the elliptical shape of the entry face plane of the catalyst element 6 engages an annular rim 22 in the front end region, and a wire screen 23 as well as shock absorber braids 24 and 25 are between the housing 7 and the periphery of the edge and the Catalyst element provided. The damper braid 24 is between a shoulder of the housing 7 and the annular edge 22 arranged, while the shock absorber braid 25 between a shoulder of the Housing and the end of the catalyst element is arranged. In this way it is monolithic Catalyst element 6 from the wire screen 23 and the shock absorber braids 24 ur.d 25 resiliently flexible held so that movement of the catalyst element is prevented. The shock absorber braid is also effective 24 with the annular rim 22 as a sealing device that prevents exhaust gases through the Space between the catalyst element and the inner wall of the housing 7 pass through.

Die in Strömungsrichtung vorderen Auspuffrohre 2 und 3 stehen mit den Einlaßöffnungen 14 bzw. 15 in Eingriff und sind mit diesen verschweißt.The front exhaust pipes 2 and 3 in the direction of flow are in with the inlet openings 14 and 15, respectively Engagement and are welded to these.

Der Schutzmantel 8 weist zwei Hälften 31 und 32 auf. Die Hälften 31 und 32 sind in dem die Auspuffrohre umgebenden Bereich miteinander vereinigt und durch Beizen 33 befestigt. Die Umfangsränder der Hälften 31 und 32 sind im Abstand voneinander angeordnet, und zwischen dem Schutzmantel 8 und dem Gehäuse 7 ist ein Raum 34 gebildet. Dadurch kann Luft aus dem SpaltThe protective jacket 8 has two halves 31 and 32. The halves 31 and 32 are united with one another and through in the area surrounding the exhaust pipes Pickling 33 attached. The peripheral edges of the halves 31 and 32 are arranged at a distance from one another, and A space 34 is formed between the protective jacket 8 and the housing 7. This allows air to come out of the gap

35 zwischen den Rändern der Hälften 31 und 32 in den Raum 34 eintreten und die Vorrichtung im Betrieb kühlen.35 between the edges of the halves 31 and 32 in the Enter room 34 and cool the device during operation.

In der Einlaßkammer 17 ist zur Verstärkung ein StiftIn the inlet chamber 17 there is a pin for reinforcement

36 angeordnet, an welchem ein Verteiler 37 befestigt ist. Der Stift 36 hat an beiden Enden Bereiche 36a mit kleinerem Durchmesser und Schultern 36b. Jeder Bereich 36a mit kleinerem Durchmesser steht mit einem Loch in der Halbschale 11 bzw. 10 in Eingriff, während die Schulter 366 die Halbschale abstützt. Zwischen dem Bereich 36a und der Halbschale ist eine Schweißverbindung hergestellt. Dadurch können die Halbschalen 1136 arranged to which a manifold 37 is attached. The pin 36 has smaller diameter portions 36a and shoulders 36b at both ends. Each area 36a with a smaller diameter is in engagement with a hole in the half-shell 11 or 10, while the shoulder 366 supports the half-shell. A welded connection is made between the area 36a and the half-shell. As a result, the half-shells 11

und 10 exakt zu dem Gehäuse von vorherbestimmter Abmessung zusammengebaut werden. Ferner ist der Stift 36 an einer Stelle angeordnet, die in gewissem Abstand in Strömungsrichtung vor dem Kreuzungspunkt der Achsen der Einlaßöffnungen 14 und 15 liegt, wie F i g. 4 zeigt.and 10 exactly to the housing of the predetermined one Dimension to be assembled. Furthermore, the pin 36 is arranged at a location that to a certain extent Distance in the direction of flow before the intersection of the axes of the inlet openings 14 and 15, like F i g. 4 shows.

Der Verteiler 37 besteht aus einer V-förmig gestalteten Verteilerplatte 38. Diese ist so angeordnet daß die Achse jeder Einlaßöffnung einen Einfallswinkel θ mit dem betreffei.den Schenkel des V bildet wodurch ι ο die Abgasströmung zu der von der Einlaßöffnung entfernten Seiten des Katalysatorelements abgelenkt wird. Die Verteilerplatte 38 weist eine Vielzahl von Löchern 39 auf, deren Gesamtöffnungsfläche so festgelegt ist, daß etwa die Hälfte der Abgasmenge durch die Löcher strömt Ferner ist die Höhe der Verteilerplatte so bemessen, daß sie etwa der Hälfte des Durchmessers des Gasströmungskanals entspricht. Dies ist die bevorzugte Abmessung, um eine wirksame Verteilung der Abgase bei geringem Auspuffwiderstand, d. h. Rückdruck, zu erzielen.The distributor 37 consists of a V-shaped distributor plate 38. This is arranged in this way that the axis of each inlet opening forms an angle of incidence θ with the relevant leg of the V, whereby ι ο diverted the exhaust gas flow to the side of the catalyst element remote from the inlet opening will. The distributor plate 38 has a plurality of holes 39, the total opening area of which is as follows it is determined that about half the amount of exhaust gas flows through the holes Dimension the distribution plate so that it corresponds to approximately half the diameter of the gas flow channel. this is the preferred dimension to ensure efficient exhaust gas distribution with low exhaust resistance, d. H. Back pressure to achieve.

im Betrieb strömen Abgase aus den Einlaßöffnungen 14 und 15 abwechselnd in Abhängigkeit v^n der Zündfolge des Motors in die Einlaßkammer 17. Etwa die Hälfte der Abgase fließt durch die Löcher 39 der Verteilerplatte 38, während der Rest von der Platte mit dem Einfallswinkel θ zum Umfangsbereich der Einlaßkammer hin abgelenkt wird. Dadurch können die Abgase gleichmäßig: auf das Katalysatorelement verteilt werden. Da außerdem die Achse der Einlaßöffnungen zur Stirnfläche des Katalysatorelements 6 unter einem Winkel steht treffen die Abgase auf die Wand 40 jedes Durchlasses im Katalysatorelement 6 auf, wie Fig.4 zeigt. Deshalb fließen die Abgase durch jeden Durchlaß des Katalysatorelements in einer Zickzackströmung, wie durch die Pfeile in Fig.4 angedeutet Die Zickzackströmung verlängert die Verweilzeit der Gase im Katalysatorelement so daß die kataiytische Umsetzung in der Vorrichtung im Vergleich zu einem herkömmlichen Konverter, bei dem die Gase gerade durch den Kanal strömen, gefördert wird.in operation, exhaust gases flow out of the inlet openings 14 and 15 alternately depending on the Firing order of the engine into the intake chamber 17. Approximately half of the exhaust gases flow through the holes 39 of the Distributor plate 38, while the remainder of the plate at the angle of incidence θ to the peripheral area of the inlet chamber is distracted. This allows the exhaust gases to be distributed evenly: over the catalytic converter element will. In addition, since the axis of the inlet openings to the end face of the catalyst element 6 under a At an angle, the exhaust gases hit the wall 40 of each passage in the catalyst element 6, as shown in FIG shows. Therefore, the exhaust gases flow in a zigzag through each passage of the catalyst element, as indicated by the arrows in Fig.4 Zigzag flow extends the residence time of the gases in the catalyst element so that the catalytic conversion in the device compared to a conventional converter, in which the gases are straight flow through the channel, is promoted.

Gemäß der Erfindung werden also die Abgase in der Einlaßkammer einem Verteiler ausgesetzt, so daß sie gleichmäßig auf das Katalysatorelement verteilt werden und mit reduzierter Strömungsgeschwindigkeit das Katalysatorelement durchströmen. Deshalb erfolgt eine ausreichende Reaktion der giftigen Bestandteile im Katalysatorelement, so daß die Menge g:*;iger Bestandteile auf das nötige Niveau abgesenkt wird.According to the invention, the exhaust gases in the inlet chamber are exposed to a distributor so that they are evenly distributed over the catalytic converter element and flow through the catalytic converter element at a reduced flow rate. Therefore, the poisonous constituents react sufficiently in the catalytic converter element, so that the amount of g : *; iger constituents is reduced to the required level.

Die Halbschalen 11 und 10 sind außerdem mit Hilfe des Stiftes 36 in der gewünschten Stellung abgestützt, so daß das Gehäuse mit großer Genauigkeit und Steifheit hergestellt werden kann.The half-shells 11 and 10 are also with the help of the pin 36 is supported in the desired position, so that the housing with great accuracy and rigidity can be produced.

Hierzu 2 Blatt ZeichnungenFor this purpose 2 sheets of drawings

Claims (1)

Patentanspruch:Claim: Katalytische Abgasreinigungsvorrichtung für den Verbrennungsmotor eines Kraftfahrzeugs, mit einem Gehäuse, das zwei Abgaseinlaßöffnungen, die mit den Abgasöffnungen des Verbrennungsmotors in Verbindung stehen, und eine Abgasauslaßöffnung aufweist und eine Einlaßkammer, eine Katalysatorkammer und eine Auslaßkammer bildet, wobei die Katalysatorkammer ein Katalysatorelement mit einer ebenen Eintrittsstirnfläche enthält und die Einlaßöffnungen an der Einlaßkammer so angeordnet sind, daß ihre Achsen einen spitzen Winkel mit der Ebene der Eintrittsstimfläche bilden, dadurch gekennzeichnet, daß in der Einlaßkammer (17) ein mit Löchern (39) versehener Verteiler (37) mit V-förmigem Querschnitt vorgesehen ist, der als V-förmige Verteilerplatte (38) ausgebildet ist, wobei jeweils ein Schenkel der Verteilerplatte quer zur Achse einer Einlaßöffnung (14, 15) verläuft und die VerteilerpJaUe (38) an einem die Einlaßkammer (17) verstärkenden Stift (36) befestigt ist, wobei das Gehäuse (7) im wesentlichen einen annähernd elliptischen Querschnitt aufweistCatalytic exhaust gas cleaning device for the Internal combustion engine of a motor vehicle, with a housing, the two exhaust gas inlet openings, the communicate with the exhaust ports of the internal combustion engine, and an exhaust gas outlet port and forms an inlet chamber, a catalyst chamber and an outlet chamber, the The catalyst chamber contains a catalyst element with a flat inlet end face and the Inlet ports are arranged on the inlet chamber so that their axes form an acute angle with the plane of the entry end face, thereby characterized in that in the inlet chamber (17) a distributor (37) provided with holes (39) is provided with a V-shaped cross section, which is designed as a V-shaped distributor plate (38), wherein in each case one leg of the distributor plate runs transversely to the axis of an inlet opening (14, 15) and the Distributor pipe (38) is attached to a pin (36) reinforcing the inlet chamber (17), the Housing (7) essentially has an approximately elliptical cross section 2525th
DE2913731A 1978-04-08 1979-04-05 Catalytic exhaust gas cleaning device for the internal combustion engine of a motor vehicle Expired DE2913731C2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4151478A JPS54134214A (en) 1978-04-08 1978-04-08 Catalytic converter for purifying exhaust gas of automobile

Publications (2)

Publication Number Publication Date
DE2913731A1 DE2913731A1 (en) 1979-10-11
DE2913731C2 true DE2913731C2 (en) 1983-11-10

Family

ID=12610476

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2913731A Expired DE2913731C2 (en) 1978-04-08 1979-04-05 Catalytic exhaust gas cleaning device for the internal combustion engine of a motor vehicle

Country Status (6)

Country Link
US (1) US4206178A (en)
JP (1) JPS54134214A (en)
DE (1) DE2913731C2 (en)
FR (1) FR2422029A1 (en)
GB (1) GB2022441B (en)
SE (1) SE442536B (en)

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DE3740791A1 (en) * 1987-12-02 1989-06-22 Bayerische Motoren Werke Ag Pipeline system

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Publication number Priority date Publication date Assignee Title
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DE2913731A1 (en) 1979-10-11
JPS54134214A (en) 1979-10-18
FR2422029B1 (en) 1983-06-03
SE442536B (en) 1986-01-13
US4206178A (en) 1980-06-03
FR2422029A1 (en) 1979-11-02
GB2022441A (en) 1979-12-19
SE7902410L (en) 1979-10-09
GB2022441B (en) 1982-12-01

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